/*
 * Copyright (c) 2003-2010, Live Media Pty. Ltd.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice, this list of
 *     conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright notice, this list of
 *     conditions and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.
 *  3. Neither the name of Live Media nor the names of its contributors may be used to endorse
 *     or promote products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.colony.channel;

import java.io.InputStream;
import java.io.OutputStream;
import java.util.Vector;

import com.argot.TypeException;
import com.argot.TypeLibrary;
import com.argot.remote.transport.TypeEndPoint;
import com.colony.concurrent.ThreadActivator;

public class ChannelServer
{
	private ChannelServerBack _channelBack;
	private Vector _channels;
	
	public ChannelServer( TypeLibrary library, ThreadActivator threadActivator) 
	throws TypeException
	{
		_channelBack = new ChannelServerBack( this, library, threadActivator  );
		_channels = new Vector();
	}

	public ChannelServerBack getBack()
	{
		return _channelBack;
	}

	/**
	 * Used by a server application to create a channel to a client.
	 * The server begins writing to the end point.
	 * @return
	 */
	public synchronized Channel assignChannel()
	{
		ChannelInternal channel = new ChannelInternal();
		_channels.add( channel );
		int id = _channels.indexOf( channel ) + 1;
		channel.setId( id );
		
		return channel.getChannel();
	}
	
	public synchronized ChannelIdentifier assignChannel( InputStream in, OutputStream out )
	{
		ChannelInternal channel = new ChannelInternal( in, out );
		_channels.add( channel );
		int id = _channels.indexOf( channel ) + 1;
		return new ChannelIdentifier(id);
	}
	
	public synchronized Channel getChannel( int id )
	{
		id--;
		
		if ( id > _channels.size() )
			return null;
			
		ChannelInternal channel = (ChannelInternal) _channels.get( id );
		if ( channel == null )
			return null;
			
		return channel.getChannel();
	}
	
	protected synchronized TypeEndPoint getEndPoint( int id )
	{
		id--;
		
		if ( id > _channels.size() )
		{
			return null;
		}
		ChannelInternal channel = (ChannelInternal) _channels.get( id );
		if ( channel == null )
			return null;
			
		return channel.getEndPoint();
	}
}
